I I I FLOODPLAIN INFORMATION REPORT I CRYSTAL RlVEI TOWN OF MARBLE VICINITY I GUNN I SON COUNTY COLORAOO I I r v y J I

I Jty I I I I I

Prpj arpd for Prl par j hy I Ikparlml lll of ICON EIlilll prillJlle

Nal url Rt SOllH S 100 S kroll Strl pI

I Colorado W tN ui II ltX

Consryat ion Board CI ulpllllial Colorado 0112

I I n ShPrmall Slrl I t R xKI1 nl m 1 221 0802 IlJpllu r Color do 8020 I J C QiN ENGINEERING INC I August 200 I

I I I TABLE OF CONTENTS Page

I 1 0 INTRODUCTION L1 Purpose of Study I 1 2 Authority and Acknowledgements I I 1 3 Coordination I 1 4 Previous Studies 3 I 2 0 AREA STUDIED 21 Scope of Study 3 2 2 Community Description 3 I 23 Watershed Description 4 24 Flooding History 5 I 3 0 ENGINEERING METHODS 31 Hydrologic Analyses 7 3 2 Hydraulic Analysis 7

I 4 0 FLOODPLAIN MANAGEMENT APPLICATIONS 41 Floodplain Boundaries 8 I 4 2 Floodways 8 5 0 LOCATION OF DATA 9 I 6 0 BIBLIOGRAPHY AND REFERENCES 10

TABLES

I Table I Crystal River Vicinity Climatology Data 4 Table 2 Historic Floods Crystal River 5 I Table 3 Summary ofDischarges for the Crystal River 7 FIGURES

I Figures 1 2 Photos 1945 Flood Event Marble Colorado 6 Figure 3 Floodway Schematic 9 I PLATES Plate I Vicinity Map 2 Plates 2 3 Floodway Data Tables I Plate 4 Plate Index Map Plates 5 12 Flood Hazard Area Maps Plates 13 22 Flood Profiles I Plate 23 Typical Cross Sections

I Cover Photo Snowshoe Ranch Bridge over the Crystal River Brian LeDoux September 2003 I

I I 1 0 INTRODUCTION 1 1 Purpose of Study

I This Floodplain Information Report provides new and revised information on the existence and severity of flood hazards along the Crystal River in the geographic area of the Town of Marble and in unincorporated portions of I Gunnison County Colorado Plate I This study has developed flood risk data that will be used to assist the County and the Town of Marble in its efforts to promote sound land use management and regulation of floodplain I development This report may also be used by FEMA as an existing data study XDS for future Flood Insurance Study revisions I 1 2 Authority and Acknowledgments

The source of authority for this Floodplain Information Report is the Colorado I Water Conservation Board under Contract Numbers CI53924 and CI53986 with ICON Engineering Inc to perform hydrologic and hydraulic analysis to complete a floodplain delineation study on the Crystal River within Gunnison I County Colorado According to Section 37 60 106 1 c of the Colorado Revised Statutes the Colorado Water Conservation Board has the power and duty to devise and formulate methods means and plans for bringing about I the greater utilization of the waters of the state and the prevention of flood damages therefrom I 13 Coordination During the preparation of this Floodplain Information Report for Gunnison County and the Town of Marble the following public and private entities were I contacted and were instrumental in the preparation of this report Colorado Water Conservation Board CWCB Gunnison County Town of Carbondale U S Geological Survey USGS Marble Historical Society and Museum I ICON Engineering Inc and Kucera International Inc Specifically the CWCB USGS and Gunnison County supplied information used in the I preparation ofthis report A general historical information search was coordinated with the Marble Historical Society and Museum for historical background information I available publications and photographs of past floods Much of the information presented in this study was obtained from the Town of Marble I website Reference I The USGS was contacted to obtain historic stream gage data Additionally the flood frequency analysis program PEAKFQ Reference 2 was obtained from I the USGS and used for developing flood discharges for this study

The Gunnison County Planning Department provided mapping of the I Crystal River study reach Reference 3

ICON Engineering Inc I I August 2004 I

I

I CRYSTAL RIVER STUDY LIMIT MAP I 10 DENVER

us INlERSTATE 70 I

I TO GRANO JINCllON

I 1b EAGLE COUNTY GARFiELD COUNT I CiRBONOAl

1

I Iv

1 8 I I I I

I DELTA vC U 1 jd I

I I vis C U N I GU NNi V

I I PLATE 1 I I

ICON Engineering Inc 2 I August 2004 I

I

I Supplemental background information and assistance in project coordination was supplied by the CWCB

I 14 Previous Studies

One detailed floodplain study was previously completed for the Crystal River I in the vicinity of the Town of Marble Colorado In 1979 Wright Water Engineers under contract to Pitkin County and the Colorado Water Conservation Board completed a report entitled Floodplain Information I Report Crystal River and Coal Creek Pitkin County Colorado Reference 4 This report included detailed hydrologic and hydraulic analyses for the Crystal River in Pitkin County The upstream limit of the 1979 study is approximately I six miles downstream of the Town of Marble and approximately three miles downstream ofthe downstream limit of this study at the County Road 3 bridge

I A Flood Hazard Boundary Map FHBM dated June 17 1977 was previously developed for the Town of Marble and Gunnison County by the U S Department of Housing and Urban Development Federal Insurance I Administration Reference 5 I 2 0 AREA STUDIED 2 1 Scope ofStudy

I This Floodplain Information Report covers a reach of the Crystal River within the Town of Marble and portions of unincorporated Gunnison County Colorado For this report the Crystal River has been studied using detailed I methods for a reach of approximately 45 miles in length The study reach extends from just downstream of the Gunnison County Road 3 bridge to of the Beaver Lake State Area I upstream Fishing 2 2 Community Description

Gunnison County is located in central western Colorado approximately 130 I miles south of the Colorado Wyoming state line The Town of Marble is located in northwestern Gunnison County The Town of Marble was founded in 1881 by settlers and prospectors and was officially incorporated in 1899 I The peak population of Marble occurred from 1912 to 1917 when the town supported a population of around 1 400 people Currently the population of Marble is around 300 people One of the world s largest concentrations of I marble is located in the mountains immediately to the south of the Town which was the source of the town s name and growing economy in the early I 1900 s I

ICON Engineering Inc 3 I August 2004 I

I

I 2 3 Watershed Description

The Crystal River watershed is within the Colorado River Basin and extends I high into the Elk Mountain Range in the Rocky Mountains The watershed also encompasses area from the White River National Forest and Maroon Bells Snowmass Wilderness The elevation ofthe watershed approaches 14 200 feet I at the top of Maroon Peak located within the famous mountain group the Maroon Bells The watershed elevation drops to around 6 100 feet where the Crystal River discharges into the Roaring Fork River near Carbondale I Colorado

The Crystal River mainstem is approximately 30 miles long extending from I the Town of Crystal located approximately 5 miles upstream of Marble to the Town of Carbondale The channel gradient is very steep with slopes ranging I from 3 8 near Crystal to 14 upstream of Carbondale Vegetation within the Crystal River watershed reflects a sparsely developed mountain climatology Between Marble and Carbondale the watershed is I densely vegetated with evergreen and aspen trees along with other natural mountain vegetation Above Marble and up to about 11 200 feet the watershed reflects a high alpine environment with woody vegetation along I with rock outcroppings Rock talus and steep mountains are prevalent above 11 200 feet

I The Crystal River basin is a semiarid mountain environment with cool summers and long winters Runoff is attributed to intense localized thunderstorm rainfall events during the summer months and snow melt during I the spring and early summer months The following table provides climatological data for Aspen Colorado located approximately 20 miles northeast of Marble and for Crested Butte Colorado located approximately 41 I miles southeast of Marble Aspen and Crested Butte are the closest National Weather Service Station locations to Marble

I Table Crystal River Vicinity Climatology Datal

Mean Annual July Mean January Mean I LOCATION Precipitation Temperature Temperature Cinches CO F CO F I Aspen Colorado 23 3 617 20 7 Crested Butte Colorado 23 9 56 0 8A

I 1971 IThis data was compiled from National Weather Service records from year to 2000 I

ICON Engineering Inc 4 I August 2004 I

I

I 24 Flooding History

The history of flooding in the vicinity of the Town of Marble and the Crystal I River has been best documented by the 1979 Floodplain Information Report for the Crystal River and Coal Creek prepared for Pitkin County by Wright Water Engineers Inc This report documents historic floods from interviews I with local residents and a Corps of Engineers hydrologic study on the Crystal River Reference 6 This report indicates that the largest flows recorded on the Crystal River occur as a result of snowmelt during the spring and early I summer months Flooding during the late summer and fall months results from rainstorms Often these storms will also initiate large mud debris flows on tributaries to the Crystal River Local residents recall that Highway 133 has I been closed many times by mud slides in the summer months The largest recorded snowmelt and rain floods in the Crystal River basin have been tabulated in Table 2 This table was compiled from data presented by the U S I Geological Survey Water Supply Records References 7 8 9 I Table 2 Historic Floods Crystal River Drainage Area Peak Discharge I Date Location sq mi Source cfs 06 25 17 Crystal River at Marble 74 3 S 2 980 06 21 38 Crystal River near Redstone 229 S 4400 I 08 08 41 Carbonate Creek at Marble 5 1 R 07 31 45 Carbonate Creek at Marble 5 1 R

06 18 49 Crystal River near Redstone 229 S 3 960 I 06 15 52 Crystal River near Redstone 229 S 3 960 06 14 53 Crystal River near Redstone 229 S 4 110 07 01 57 Crvstal River above Avalanche Creek 167 S 3 980 I 06 20 59 Thompson Creek near Carbondale 76 S 780 06 12 65 Thompson Creek near Carbondale 76 S 630 06 22 65 Crvstal River above Avalanche Creek 167 S 2 780 I 06 24171 Crystal River at Placita 107 S 1 940 07 12 73 Crvstal River above Avalanche Creek 167 R 1 780 I 07 2477 Dutch Creek Trib of Coal Creek V R 1 000

8 Snow R Rain Indirect flow estimate I Flooding source or discharge unknown

I Carbonate Creek located near the Town of Marble has a history of rainstorm floods and large mud debris flows During the August 8 1941 flood event a structure the Horace Williams House was documented to have moved over 30 I feet off ofits original foundation as a result of the flooding Additionally high

ICON Engineering Inc 5 I August 2004 I

I

water from the July 31 1945 storm took out several bridges along the Crystal I River from Marble to Carbondale Photographs ofthe flood in 1945 are shown in Figure I and Figure 2

I Flooding along the Crystal River and in the Town of Marble has been best documented in 1941 and 1945 However as indicated by Table 2 historic flood events along the Crystal River have also occurred in 1917 1938 1949 I 1952 1953 1957 1965 1971 and 1973 I Figure 1 1945 Flood Event Marble Colorado Schutte 1945 I I I I I

I Figure 2 1945 Flood Event Marble Colorado Schutte 1945 I I I I I I

ICON Engineering Inc 6 I August 2004 I

I I 3 0 ENGINEERING METHODS 3 t Hydrologic Analyses

I Hydrologic analyses were carried out to establish the peak discharge frequency relationships for the Crystal River in the vicinity of the Town of Marble I Colorado Discharges along the Crystal River were calculated using the PEAKFQ I computer program Reference 2 which performs statistical flood frequency analyses of annual peak discharges following procedures recommended in Bulletin 17 B of the Interagency Advisory Committee on Water Data 1982 I The analysis for the Crystal River incorporates USGS gage information with over 46 years of record along the Crystal River 1956 to 2001 Peak flood discharges were determined using annual peak flow data from the Placita and I Avalanche Creek gages located just downstream of the Town of Marble The calculated peak flood discharges were adjusted at various locations along the study reach based on the guidelines provided in the Manual for Estimating Characteristics ofNatural Flow Streams in Colorado Technical Manual No I I Reference 10

I Peak discharge drainage area relationships for the Crystal River are shown in Table 3

I Table 3 Summary ofDischargesfor the Crystal River

Flooding Source and Location Drainage Area Peak Discharge cfs I Along Crystal River Square Miles to Year 50 Year tOO Year 500 Year Confluence with Rapid Creek 93 05 1 994 2 445 2 625 3 028 Confluence with Milton Creek 83 65 1 833 2 248 2 413 2 783 I Town ofMarble 73 59 1 657 2 031 2 181 2 515 Upstream Limit of Study 53 32 1 284 1 575 1 691 1 950 I

Peak flood discharges presented in Table 3 compare weIl with those presented I in the 1979 Floodplain Information Report for the Crystal River and Coal Creek prepared for Pitkin County by Wright Water Engineers Inc This 1979 report indicates a 100 year peak discharge of 2 400 cfs at the Town of Marble I This compares within 10 ofthe peak flood discharge presented in Table 3 at the Town of Marble 2 181 cfs The hydrologic analysis for this study incorporates an additional 22 years ofgage records beyond the 1979 study I 3 2 Hydraulic Analysis I Analysis of the hydraulic characteristics of flooding from the Crystal River were carried out to provide estimates of the flood elevations for the 10 50 I ICON Engineering Inc 7 August 2004 I

I

100 and SOD year storm events Water surface elevations WSELs were I computed using the U S Army Corps of Engineers HEC RAS step backwater program Reference II Cross sections for the backwater program were taken from project topographic mapping Hydraulic structures such as bridges along I the project reach were field surveyed in 2003

A map index for the floodplain boundary maps is shown on Plate 4 Floodplain I boundaries for the 100 and SOD year flood events are delineated on Plates 5 through 12 The corresponding flood profiles on plates 13 through 22 present the water surface elevations and water depths for the 10 50 100 and 500 I year flood events relative to the river stream bed Representative cross sections are shown on Plate 23 I 4 0 FLOODPLAIN MANAGEMENT APPLICATIONS I 4 1 Floodplain Boundaries I To provide a national standard without regional discrimination the I percent annual chance 100 year flood has been adopted by FEMA as the base flood for floodplain management purposes The O2 percent annual chance 500 I year flood is employed to indicate additional areas of flood risk in the community The 100 year floodplain boundaries have been delineated using the flood elevations determined at each cross section Between cross sections I the boundaries were interpolated using the best available topographic mapping at the time of this study

I 4 2 Floodways

Encroachment on floodplains such as structures and fill reduces flood I carrying capacity increases flood heights and velocities and increases flood hazards in areas beyond the encroachment itself One aspect of floodplain management involves balancing the economic gain from floodplain I development against the resulting increase in flood hazard For purposes ofthe National Flood Insurance Program NFIP a floodway is used as a tool to assist local communities in this aspect of floodplain management Under this I concept the area of the I DO year floodplain is divided into a floodway and a floodway fringe The floodway is the channel of a stream plus any adjacent floodplain areas that must be kept free of encroachment so that the I DO year I flood can be carried without substantial increases in flood heights Minimum federal standards limit such water surface increases to I D foot provided that hazardous velocities are not produced The floodways in this study are I presented as minimum standards that can be adopted directly or that can be used as a basis for additional floodway studies I

ICON Engineering Inc 8 I August 2004 I

I

The floodway presented in this study was computed on the basis of equal I conveyance reduction from each side of the floodplain Fioodway widths were computed at cross sections Between cross sections the floodway boundaries were interpolated The results of the floodway computations are tabulated for I selected cross sections as shown on Plates 2 and 3 In cases where the floodway and 100 year floodplain boundaries are either close together or I collinear only the floodway boundary is shown The area between the floodway and 100 year floodplain boundaries is termed the floodway fringe The floodway fringe encompasses the portion of the I floodplain that could be completely obstructed without increasing the WSEL of the 100 year flood more than o foot at any point Typical relationships between the floodway and the floodway fringe and their significance to I floodplain development are shown below I Figure 3 Floodway Schematic

100 YEAR FLOODPLAIN

I FLOODWAY FLOODWAY LOODWAY FRINGE FRINGE

SlREAtI I CHANNEL FLOOO ELEVATIONIWHEN CONFINED 1MlHIN FLOODWAY

I ENCROACHMENT I

AREA OF FLOODPLAIN THAT COULD BE USED FLOOD ELEVATION BEFORE fOR DEVELOPMENT BY RAISING GROUND ENCROACHMENT ON FLOODPLAlN

I LINE AB IS THE 000 ELEVAlION BEFORE ENCROIOiWENT LINE CD IS THE ROOD ElEVA110N AFTER EN OACHWENT SUACHARCE IS NOT TO EXCEED 1 0 FOOT AA REQU1REWEN1 OR LESSER AtlOUNT IF SPECIFIED BY THE STATE I

5 0 LOCATION OF DATA I Information pertinent in the preparation ofthis study can be obtained by contacting the Colorado Water Conservation Board 1313 Sherman Street Room 721 Denver I Colorado 80203 This study may also be viewed and printed online at the CWCB s digital Water Resource Information Center Visit us at www cwcb state co us I I

ICON Engineering Inc 9 I August 2004 I

I

I 6 0 BIBLIOGRAPHY AND REFERENCES I I Town of Marble Website www marblecolorado org March 2003 2 U S Geological Survey PEAKFQ Flood Frequencv Analvsis Based on Bulletin I 17B Version 4 0 December I 2000 3 Kucera International Inc Topographic Map Crvstal River Datum NAVD 88 I Contour Interval 2 feet December 2003 4 Wright Water Engineers Inc Floodplain Information Report Crvstal River and Coal Creek Pitkin Countv Colorado Colorado Water Conservation Board and I Pitkin County Colorado 1979

5 U S Department of Housing and Urban Development Federal Insurance I Administration Flood Hazard Boundary Map Town of Marble Colorado Scale I 400 June 17 1977

I 6 U S Army Corps of Engineers Crvstal River Colorado Hvdrologv Internal Office Report Sacramento District Corps of Engineers Sacramento California I February 1979 7 U S Geological Survey Compilation of Records of Surface Waters ofthe United I States October 1950 to September 1960 Part 9 Colorado River Basin Water Supply Paper 1733 US Government Printing Office Washington D C 1964 I 8 U S Geological Survey Compilation of Records of Surface Waters of the United States through September 1950 Part 9 Colorado River Basin Water Supply Paper 1313 U S Government Printing Office Washington D C 1964 I 9 U S Geological Survey Water Resources Data for Colorado Part L Surface Water Records Denver Federal Center Lakewood Colorado 1961 1976 I 10 Colorado Water Conservation Board U S Geological Survey Manual for Estimation Flood Characteristics ofNatural Flow Streams in Colorado Technical I Manual No 1 Denver Colorado 1976

II U S Army Corps of Engineers HEC RAS 3 1 1 Computer Program Davis I California May 2003 I I

ICON Engineering Inc 10 I August 2004 I

BASE FLOOD FLOODING SOURCE FLOODWAY WATER SURFACE ELEVATION FEET NGVD SECTION MEAN CROSS SECTION AREA VELOCITY WITHOUT WITH WIDTH2 FEET REGULATORY INCREASE LOCATION SQUARE FEET PER FLOODWAY FLOODWAY FEET SECOND

0 38 207 12 7 7 689 0 7 689 0 7 68R5 0 5 329 55 279 9A 7 692 5 7 692 5 7 693A 1 0 505 36 202 no 7 694 2 7 694 2 7 6942 0 0 547 47 258 10 3 7 695 9 7 695 9 7 695 9 0 0 746 55 316 8 3 7 697 7 7 697 7 7 697 8 0 1 1 241 80 304 7 9 7700 9 7 700 9 7 7013 OA 1 750 50 208 11 6 7 705 8 7 705 8 7 706 1 0 3 2 242 46 216 112 7 7118 7 7118 7 712 3 0 6 2 755 72 254 9 5 7718A 7 718A 7 718A 0 0 3 258 65 238 10 1 7 725 8 7 725 8 7 725 8 0 0 3 790 60 230 10 5 7 733 8 7 733 8 7 733 8 0 0 4 242 77 259 9 3 7 744 2 7 7442 7 744 2 0 0 4 728 68 234 10 3 7 751 3 7 7513 7 7513 0 0 5 216 57 219 11 0 7 7613 7 761 3 7 761 A 0 1 5 720 61 239 10 1 7 767 2 7 7672 7 767 2 0 0 6 179 68 328 7A 7 771 5 7 7715 7 7717 0 3 6 674 81 344 7 0 7773 8 7773 8 7 774 6 0 9 7 123 63 278 87 7 776 7 7 776 7 7 777A 0 7 7 560 55 270 8 9 7 780 0 7 780 0 7 780 1 02 8 048 59 535 8 6 7 782 3 7 782 3 7 783 3 1 0 8 077 64 336 72 7 783 9 7 783 9 7 783 9 0 0 8 612 110 345 6 3 7 786 0 7786 0 7 786 0 0 0 9 086 91 329 6 6 7787 5 7 787 5 7 788A 1 0 9 536 140 398 5 5 7 790 0 7 790 0 7790 4 OA 10 063 140 399 5 5 7 792A 7 792A 7 793 0 0 6 10 584 80 268 8 1 7 797 0 7 797 0 7 797 1 0 1

1 Feet Above Downstream Limits of Study 2 Encroachment Limited to Channel Banks Encroachment may be Less than 1 0 Foot

COLORADO WATER CONSERVATION BOARD ll FLOODWAY DATA f m TOWN OF MARBLE VICINITY GUNNISON COUNTY CO CRYSTAL RIVER

BASE FLOOD FLOODING SOURCE FLOODWAY WATER SURFACE ELEVATION FEET NGVD SECTION MEAN CROSS SECTION AREA VELOCITY WITHOUT WITH WIDTH2 FEET REGULATORY INCREASE LOCATION SQUARE FEET PER FLOODWAY FLOODWAY FEET SECOND

11 147 187 465 4 7 7 800 9 4 800 9 7 8014 0 5 11 815 110 326 6 7 7 8092 7 8092 7 810 1 0 9 12 347 82 232 94 7 815 7 7 815 7 7 8164 0 7 12 820 46 191 114 7 823 9 7 823 9 7 824 3 04 13 314 78 274 8 6 7 832 1 7 832 1 7 832 1 0 0 13 779 63 226 9 7 7 839 6 7 839 6 7 839 6 0 0 14 378 44 194 113 7 852 6 7 852 6 7 853 6 1 0 14 921 87 249 8 8 7 8654 7 8654 7 865 6 02 15423 66 238 9 2 7 880 5 7 880 5 7 880 5 0 0 15 909 59 237 92 7 893 0 7 893 0 7 893 0 0 0 16407 60 216 10 1 7 900 9 7 900 9 7 900 9 0 0 16 883 86 258 84 7 906 5 7 906 5 7 906 5 0 0 17475 65 235 9 3 7 9124 7 9124 7 9124 0 0 18 067 70 228 9 6 7 918 9 7 918 9 7 918 9 0 0 18 542 41 195 11 2 7 926 6 7 926 6 7 926 6 0 0 18 578 47 251 87 7 929 2 7 929 2 7 929 2 0 0 18 783 95 687 32 7 9311 7 931 1 7 931 1 0 0 19 361 103 570 3 8 7 9312 7 9312 7 931 5 0 3 19 905 89 476 3 6 7 931 3 7 9313 7 932 3 1 0 20 771 91 374 4 5 7 932 8 7 9328 7 933 7 0 9 21 304 175 482 3 5 7 934 3 7 934 3 7 9352 0 9 21 874 185 475 3 6 7 936 1 7 936 1 7 936 7 0 6 22 724 129 247 7 1 7 9417 7 941 7 7 9417 0 0 23 204 55 319 5 3 7 944 0 7 944 0 7 944 2 02 23 230 52 290 5 8 7 944 1 7 944 1 7 944 2 0 1 23 576 99 244 6 9 7 948 1 7 948 1 7 948 2 0 1 24407 64 208 82 7 958 7 7 9587 7 958 7 0 0 Feet Above Downstream Limits of Study Encroachment Limited to Channel Banks Encroachment may be Less than 1 0 Foot

COLORADO WATER CONSERVATION BOARD Cl FLOODWAY DATA

l m TOWN OF MARBLE VICINITY GUNNISON COUNTY CO CRYSTAL RIVER

CRYST AL RIVER FLOODPLAIN INFORMATION REPORT TOWN OF MARBLE VICINITY GUNNISON COUNTY COLORADO

PLATE INDEX MAP

I

I

BY AEAAL MAPPNG PROVDED PLATE 4 i KlICfRA llONAL NC MAP D TlttNAV01988 DATE OF FtJ3HT 2003 MAY 2004 CQNTOLR NTERVAl2 FOOT ICON PROECT NO Q3 023 CRY 46

I LEGEND 12076 Cross Section Location I 7100Base Flood Elevation Floodway I 100 Year Floodplain noo Index Contour

Intermediate Contour I I I I I I I I I I I I I

I 200 100 o 200 Feel

Aerial Mapping Provided by Kucera Intemational Inc I partmt nl of NatullIIIl R rc FLOOD PLAIN INFORMATION REPORT I Colorado atu Conwn ltion Roard PLATE 5 Map Datum NAVD 1988 CRYSTAL RIVER Flood r lection lrvgr ml COlN Date of Flight 2003 lJ13Stk 1TIlanStreet Runrnnl 1 TOWN OF MARBLE VICINITY mG11 Rlr9J rS 2004 Oenvcr ColoradoK020J lOOIrnooo August I Contour Interval 2 foot ICON PROJECT 03l23 CRY415 STAnON 000 TO STAnON 2000

I LEGEND Cross Section location I nooBase Flood Elevation Roadway 100 Year Floodplain I 7700 Index Contour

Intermediate Contour I I I I I i I I I I I I I I I

I 200 100 o 200 Feet

Aerial ProVIded Kucera InternatIOnal Inc Mapping by nl urcn Drpartml or Nlllu1 Rr FLOOD PLAIN INFORMATION REPORT I r llo r Con liun 8 1111 PLATE 6 Map Datum NAVD 1988 Col Wlt CRYSTAL RIVER Flood ProlcctiUl Program C Ol N Date of 2003 Flight 1 I Sb ITlWlSreet Room721 ENGINEERING INC TOWN OF MARBLE VICINITY JO lOOt OIlc Contour Interval foot Urnver Colorado l021H AUGUST 2004 I 2 ICON P OJ T fI 03023 moot o STATION 2 0 TO STATlON 4600

I I I I I I

v af o I l1e1 JE I I I I I I I LEGEND I Cross Section Location 7100 Base Flood Elevation I Floodway 100 Year Floodplain

7100 Index Contour I 200 100 o 200 Feet Intenned ate Contour

Aerial Mapping Provided by Kucera Intemational Inc Ilrputmfflt of rur 1 RrIOurnI FLOOD PLAIN INFORMAnON REPORT I W tlt CfTWn tion rd PLATE 7 C lorN Map Datum NAVD 1988 Bo CRYSTAL RIVER tloOOProIccbonPrognrp C OlN Date of Flight 2003 130hrtn Roomnl ENGINEERING INe TOWN OF MARBLE VICINITY Colondo lI020J IIO CO AUGUST 2004 ao STA1l0N 46ll0 TO STAnON 72ll0 I Contour Interval 2 foot leON PROJECT 03023 CRY415 mv M

I LEGEND Cross Section Location I noow Base Flood Elevation Floodway 100 Year Floodplain I 0 noo Index Contour I Intennediate Contour

0 I C Pc ding v 7798 D I Q hi I C r DVOf t W 0 L I 7 I W 0 5 S C w I Q Of rJ W Iand lak

I O I I r 0 rp

G I i J11r a 1 I VI I I r I V I y fEA t J t v IW AD r l Jo r vj llf I tf r A0 r L 11 0 F r 1 I V II I I LV 0 c D r I I Jf v v t lL H9 I 200 100 o Feet G Ji0 I l Aerial Kucera Intemabonallnc mapping proVIded by Department or Natunll Rtwurcel FLOOD PLAIN INFORMATlON REPORT I NAVD 1988 Colorado Willer ConUnation Soard PLATE 8 Map Datum CRYSTAL RIVER Hood Prolection Program C QlN Date of 2003 Flight 13 Sherman Street Room 721 TOWN OF MARBLE VICINITY Contour g1 StRlf19J AUGUST 2004 Interval 2 foot I I ICON PROJECH 03023 CRV4 S Dc ruer Colorado S02Q lOI STATlON 7200 TO STATlON 104 00

I LEGEND 12076f Cross Section Location V Yltlf I 7700 Base Flood Elevation h Floodway

I 100 Year Floodplain 4 II 7700 Index Contour I Intennediat Contour

p IP L

I I V IJ

OOUltv di Po g I Eley 7798 0 3If I W

I z 1 w I t I jl u t j I C c G I fI7J r1j r I v J J a j I rI 1 I 1 7 LJ I 1

1

I I k J b S c m I r

vu 0 J I w 0 2 100 0 200 Feet

Aerial Kucera Intemabonal mapping provided by Inc frpartrnnl atunl H ur t t FLOOD PLAIN INFORMATION REPORT I Datum NAVD Colorado Wa ConlCn 1988 t ation Hoard PLATE 9 Map I CRYSTAL RIVER Hood Date of 2003 e 0 N Flight DB sem Slm Room nJ TOWN OF MARBLE VICINITY Contour Interval 2 foot Ikn U CoIoraJo K0203 mg1bt Rlf1illr 1 2004 O e AUGUST I ICON PROJECT 03023 CRV15 OO STATION 104J0 TO STATION 134 00

I LEGEND 12076 Cross Section Location I noo Base Flood Elevation Floodway I 100 Year Floodplain

7700 Index Contour

I Intermediate Contour I

I I I I I I I I I I I I

I 200 100 o 200 Feet

Aerial Kucera Intemation Inc mapping provided by Drpartmt nl ofNalunll R our FLOOD PLAIN INFORMATION REPORT I Co orMIo Waffr Comf ialion Board PLATE 10 Map Datum NAVD 1988 CRYSTAL RIVER n dI ionProsRm C O N Date of 2003 Flight 1J1J SIIennStml Rofm721 TOWN OF MARBLE VICINITY Dero Colondo 1lO2ln mQ1 f1lI19JIj AUGUST Contour Interval 2 foot lO M 2004 I ICON PROJECT 03 23CRY 415 STATION 13410 TO STATION 164 00

I LEGEND Cross Section Location DO I noo Base Flood Elevation D Floodway I 100 Year Floodplain noo Index Contour I Intennediate Contour I Town of Marble I I I I I I I I

I N I I

I 200 100 o 200 Feet

Aenal Kucera Intemabonal Inc mappIng provided by IXpartfJNfll orNalural R urvn FLOOD PLAIN INFORMATION REPORT I Colorado Water 1988 Con wnalion Board PLATE 11 Map Datum NAVO CRYSTAL RIVER Fl Jd Proloction Program C OlN Date of Flight 2003 1311 ShnnanS1reel Room 721 ENGINEERING INC TOWN OF MARBLE VICINITY bllW 2004 l1re1l er Colorado 80203 KJQ UGUST I Contour Interval 2 foot ICON PROJECT 03Q23 CRY415 STATION 16400 TO STATION 196 00

I LEGEND 12071 Cross Section Location noo I Base Flood Bevation o Floodway o

100 Year I Floodplain To of MutJk co noo Index Contour I Intermediate Contour o I 00

J I I

I Upstream limit of Study I Station 244 07 I I I I I I I

I 300 150 o 300 Feel

Aerial mapping provided by Kucera Intemabonal Inc Department or Natural Re5ouru5 FLOOD PLAIN INFORMA TION REPORT I Colorado Water CORlen tion Board PLATE 12 Map Datum NAVD 1968 CRYSTAL RIVER fl x1 Prutlion Pn nam C OfN Date of Flight 2003 TOWN OF VICINITY 1313 Shomnan StTlCL R llfl1 nl ENGINEERING INC MARBLE O toaEOIlA 2004 Contour Interval2 foot Dcrncr Colorado 0203 MAY I ICON PROJECT 03023 CRY415 OO STATION 196110 TO STATION 244 07

ELEVATION IN FEET NAVD

m o o j j o o o o o

o

o o

o o

o o

U l 0 o m o

s o 1ii

o z o Cl o m Z

m m l o o lD o

m o o

o z o U l 0 m

r o o i o

U l C o 0 0

0 0 0 I I I I I I 1 I I I 0 0 I r I m Gl I I I m 0 U Z 0 l 20 0 20 0 go ro 0 Ou m m m m 0 ou m 0 U 0 0 CD 0 r ofm Zl 0 5 0 r r 0 0 0 0 0 0 0 0 0 Z 0 0

0 0 0 0 j j 0 0 0 0

0 COLORADO WATER BOARD r CONSERVATION FLOOD PROFILES l MARBLE AND VICINITY m TOWN OF GUNNISON COUNTY CO CRYSTAL RIVER

ELEVATION IN FEET NAVD

1 N N W W 0 0 0 N g

0 0

N

0 0

w 0 0 0

W N 0 0

en 1 w lJ m 0 0 s 0 Cii

w Z 0 0 0 m Z

m

m w 1 0 0 CD 0

m 0 0 0 0 Z 0 en 1 N N W W 1 0 0 0 0 lJ

w w s 0 0 0 0 0 r 0 0 0 i 0

en 1 C N 0 0 0

0 0 I I I I I I I I I 0 I 0 I r I m I Gl I I m n n nZ 0 l 0 0 0 go ra 0 au m m m 0 u m m 0 u 0 0 0 0 a m r r r Zl a a r a a a a a a a Z

0 0 0 w 0 0 0 0

0 COLORADO WATER CONSERVATION BOARD FLOOD PROFILES m TOWN OF MARBLE AND VICINITY GUNNISON COUNTY CO CRYSTAL RIVER

ELEVATION IN FEET NAVD

co en 0 0 en en 0 0 0 0 0 0 0 0

0 0

0 0

0 0 0

f i 0 0 m 0

0 en

0 0 2 0 0 0 m Z

m m 0 r i 0 0

0

m 0 0 0

0 2 0 en i U m

0 r 0 0 1 0

0

en i 0 C 0 0 0

0 0 0 I I I I I I I I I 0 I 0 I r m I Gl I I I m 0 2 0 0 0 0 go 0 m m m 0 0 0 0 0 0 0 m D 00 m z 0 0 0 o 0 0 0 0 0 0 o 0 z o 0

0 0 0 co o 0 en o o o o

0 BOARD r COLORAOO WATER CONSERVATION FLOOD PROFILES VICINITY m TOWN OF MARBLE AND GUNNISON COUNTY CO CRYSTAL RIVER en

ELEVATION IN FEET NAVD

0 0 0 0 0 0 0 0

0 0

0 0

0 0 0

0 0

f

0 0 m 0

0 Ii

2 0 0 0 m Z

n m m

0 0 0

m

0 0 0 0 0 2 0 f

0

0 r 0 0 l 0 n f 0 C 0 0 0

0

0 0 I I I I I I I 0 I I 0 I 0 I r I m I G ij I I m 2 U 0 0 0 go 0 0 0 Ai m m 0 m m 0 u u 0 u u m 00 m z 0 0 0 0 0 0 0 0 0 0 0 0 z 0 0

0

0 0 0 0 0 0 0 0 0 0

OJ COLORADO WATER BOARD r CONSERVATION FLOOD PROFILES

i m TOWN OF MARBLE AND VICINITY COUNTY CO CRYSTAL RIVER Q GUNNISON

ELEVATION IN FEET NAVO

D D D D 1 1 D D a a a 0 a

a a

a a

a a 0

a a

f

U m a a

0 Ui

Z a 0 a m Z m m

0 0 0

m

0 0 0 Z a a f

U

r a ji a i 0

f l C 0 0 0

a 0 I I I I iD I 0 0 r m Gl I I m i0 u nZ l 0 0 go ro a Ou m m 0 Ou a a m r 00 m r r z 0 5 0 0 0 o 0 0 0 0 o 0 z o 0

a

a D D D D D D D a 1 w w en 0 a en 0 en 0 en

J CONSERVATION BOARD PROFILES r COLORADO WATER FLOOD TOWN OF MARBLE AND VICINITY m CRYSTAL RIVER N GUNNISON COUNTY CO 0

ELEVATION IN FEET NAVD

D w w 0 0 0 0 0 0

0

0

0 0

0

0 0

0 CD 0

U j 0 0 m 0 l 0

0 u j l Z 0 0 m Z

m m j l 0 OJ 0 0

m

0 0

Z 0 U j 0

r CD 0 1 0

f j C 0 0

I I I I I I I I

0 I r I m Gl I I m 0 en en enZ xl i 5 0 go ro xl Oen m m m 00 m m 0 xl xl 0 xl xl im w m r r 00 r r Zi 0 0 0 0 0 0 0 0 0 0 Z 0 0 0 0

CD 0 D 0 w w 0 0

0 COLORADO WATER CONSERVATION BOARD FLOOD PROFILES i TOWN OF AND VICINITY m MARBLE GUNNISON COUNTY CO CRYSTAL RIVER

ELEVATION IN FEET NAVO

D D co D D D D D D W W on on on on on on 00

w

w

w

f w

m

s 0 Ui w 00 2 0 m Z

m m

0

m 0 0

2 f

m

r

OJ 0

f

C 0

I I I I I I I I I I

I r I m r Gl I m i0 I 2 U i 0 0 ro U 0 go 0 m m 0 m im r r 00 m r r Zi a 0 0 0 0 0 0 0 Z a a 0 0 a a

D D D D D D D W on on a on

U BOARD r COLORADO WATER CONSERVATION FLOOD PROFILES TOWN OF MARBLE AND VICINITY m GUNNISON COUNTY CO CRYSTAL RIVER

CRYSTAL RIVER STATlON 2242 I n Qf1TAL lIVER STATlON 7560 I

I n I 5 5 li m k n I j I m LJ r m m I k a IJ m m I I

m

Statlon ft Statlon ft arrsr AL RVER ST AT10N 13T79 CRYSTAL fIVER STAlDN 18067 I n n

m n

5 5 i li j

M

1 rn m

m

m 00 00 00 0 StatlCln ft

Sta1lOn ft

AERIAL PROIDED BY of FLOOD PLAN fFORMATION REPORT Deportment Natural Reoources PLATE 23 ICtICeRA HTERNATDWNC Colorado Water Conservation Board ICON CRYSTAl RIVER MAP OAT1M N VDl988 Flood Protection Proqram TOWN OF MARBLE AN VlCNTY 0IE CF AJGHT 2003 1313 Sherman Street Room 721 ENGINEERING INC 0 AUG 2004 CONT IfTBVAL 2 FOOT ICON PROECT NO 03023 CRY 415 Denver Colorado 60203 TYJICAL CROSSSECllONS